.nav{
    position: fixed;
    top:0;
    height: px2rem(100);
    line-height: px2rem(100);
    display: flex;
    justify-content: center;
    font-weight: 700;
    font-size: px2rem(35);
    z-index: 500;
    .navicon{
        position: absolute;
        left: px2rem(15);
        cursor:pointer;
    }
    .nav-text{
        text-align: center;
    }
}